RealWorldNativePluginPerformanceTest.groovy

Rebaseline performance tests The introduction of the "platform" support introduced a couple small regressions, but also improvements in some cases. This commit re-enables the Java IDE performance test now that we have a baseline to compare with. Work on improving performance is going to happen later.

Rebaseline RealWorldNativePluginPerformanceTest All scenarios seem to be slower on `master` now. The one with the biggest regression is `build on nativeMonolithic with 0 parallel workers`. That regressed about 3%.